[Search] Tree selection syncs

Selecting something in the search results now
also makes it selected in the filetree. It
remains selected even when the search results
are cleared. (The filetree does not
automatically expand to that position though.)

platform/commonUI/general/res/sass/search/_layout.scss

@@ -42,6 +42,11 @@
 	    .tree-holder {
             // Want tree holder to start right below the search bar
 		    top: 0;
+            
+            // Make tree invisible when there are things in search results
+            &.search-in-use {
+                display: none;
+            }
 	    }
     }
 }